from material gathered in the estuary of the Brazilian river 

 Tocantins. 



A few typical forms of A. fonsa were found in the plankton 

 along with A. gracilis. 



The predominance of A. gracilis over all other species would 

 seem to give it special economic value, and it would be interesting 

 to note whether any of our Gulf fishes make an exclusive diet 

 off the animal, either at certain seasons of the year or at some 

 certain stages of their life histories. 



10. Tortamis sp. A single specimen of this curious genus was 

 noted at the Station in material from the plankton, but was not 

 given critical study at the time, and the preserved material has 

 failed to furnish other specimens. 



11. Oithona similis Claus. A few specimens of what fitted 

 in very well with the descriptions of Claus' form were secured 

 from Calcasieu Pass and St. John's Bayou. The form was the 

 only species found with the egg-sacs attached during the whole 

 period of the writer's stay at the Station. Some of the other 

 species had spermataphores attached, and thus ensured maturity 

 and a safe basis for diagnosis, but the general absence of eggs 

 was a marked feature in all the gatherings. 



12. Miracia efferata Dana. This well differentiated Harpac- 

 ticid was found in sparse numbers in collections from St. John's 

 Bayou only. 



13. Ameira sp. One or two specimens fitting in with this 

 genus were found in St. John's Bayou and Calcasieu Pass. The 

 species has not yet been sufficiently studied so as to place it 

 definitely. 



14. Laophonte mississippieiisis Herrick (?). A few speci- 

 mens of what seemed to be Herrick's species were found in Cal- 

 casieu Pass gatherings. More material will be required before 

 the form can be placed definitely; 



15. Oncaea venusti Philippi. A few specimens of this rather 

 handsome form were secured in the plankton and were given 

 cursory examination at the Station from fresh material brought 

 in, but which afterwards gave out before it could be gone over 

 thoroughly. 



16. Corycaeus elongatus Claus. 



17. Corycaeus cariuatns Giesbrecht. 



18. Corycaeus sp. 



The first named species of Corycaeus was rather common in 

 the plankton collections, and was also noticed in material from 

 St. John's Bayou. A few specimens agreeing well with the 



